Extrusion-press.



L. G. DERAIN.

BXTRUSION PRESS.

APPLICATION FILED FEB. 14, 1911.

Patented Sept. 3, 1912.

L. G. DBRAIN.

BXTRUSION PRESS.

APPLIOATIONPILBD PEB. 14, 1911.

1,037-,21 3, Patented Sept. 3, 1912.

4 SHEETS-SHEET 2.

VV/TNESSES VIZM /jkma L. G. DERAIN. EXTRUSION PRESS.

APPLICATION FILED FBB.14, 1911.

1,037,21 3, Patented sept. 3, 1912.

5/ 49 4 SHEETS-SHEET 3. Figi L. G. DERAIN.

BXTRUSION PRESS.

APPLIOATION FILED 11513.14, 1911.

1,037,21 3, Patented Sept. 3, 1912.

4 SHEETS-SHEET 4.

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4 k el t W/VT/vfSSES: gum W E "LOUS GEORGES DERAN, 0FBOULOGNE-SUR-SEINE, NEAR PARIS, FRANCE.

EXTRUSION-ZPRESS.

.To all 'whom t may concern Be it known that I, Louis GEORGES DE- RAIN,of' Boulogne-sur-Seine, near Paris, France, engineer, have inventedcertain new andv useful Improvements in Extrusion- Presses, of which thefollowing is a, specification.

This invention relates to extrusion presses of the kind in which aningot raised to atemperature varying with the metal under treatment, butproperly determined according to the nature of the metal, is placed in acylindrical chamber called a container, and is then forced by pressurethrough an eX- trusion die located at the end of the container. Thesection of the opening of this die correspondsto the proiile to beproduced. Machines as at present employed for this method of manufacturecannot force the whole of the ingotthrough the die, as the plunger forforcing the metal out of the con tainer and through the die cannot beallowed tov come right up against the die Without risk of breakages.Consequently, when the tube, bar or the like is drawn or extruded, itremains attached at one end to a tail piece or sprue located at theentrance 'to 'the die.l

ln order to release the tube, bar or other article, -the die has to beshifted to bring it out of the machine, and the sprue has to be cut oliin 'front of the die, an operation that necessitates shift-ing of thedie andcutting ott the sprue hot. During these operations the machine isdoing no work, and consefluently the output is greatly reduced.

The present invention dispenses with the operation of cutting oil thesprue hot in the press itself. For this purpose I employ a divided dieprovided with means whereby the members thereof are adapted to bebrought together for the extrusion operatie n and to .be moved apart topermit of the removal of the article.

rlhe die will generally be made 1n two or more parts each of which maybe mounted on a plunger, piston, slide or the like. it the end of theextrusion operation the two portions of the die are moved apart allowthe tube or article to be withdrawn with 'the sprue attached. The spruemay then be sawed or cut oli' cold in a separate shop. T he manufact-urecan thus proceed without 1nterruption.

`Specification of Letters Patent.

Patented Sept. 3, i912.

Application filed 'February 14, 1911. Serial No. $028,542.

ln a. form of apparatus according to the invention the die is dividedlongitudinally into two or more parts and is arranged in combinationwith an ingot container adapted to be moved longitudinally toward andaway from the die, and means are provided for moving the port-ions ofthedie apart after suitable retract-ion of the container, so as to nablethe article produced to be withdrawn. he container is preferablyarranged, and operatedso as to grip or bind upon the die when advanced,and keep the same rmly together 'for the extrusion oieration.

.lhe pistons, plungers, slides or like devices :for carrying the 'artsof the die may be arranged to be moved together and apart by hydraulicor other mec anism, so as to close and open the die at the requiredtimes. This operation of the die-carrying devices may be imparted tothem by means of the reciprocating movement of the container, throughthe medium of levers or other suitable devices, so arranged and combinedthat when the container is retracted the die is opened, and that whenthe container advances the die is closed. The container is preferably soarranged and operated that after the die parts are brought together :it

envelope and binds or holds them together for the extrusion operation.

According to a further part of the inventionv a resilient connection isprovided between 'the die-carrying devices and their operating levers ormembers, this connect-ion being adapted to come into action when thecontainer colnes upon the arts of the die in enveloping or clamping t 1esame.

The invention comprises further improvements in details, which willappear from the. 4

description and claiming clauses.

The accompanying drawings show by way of example a form of 'the machineconstructed to embodythe invention. y Figures l, 2 and 3 represent themachine in longitudinal elevation, plan and end view respectively. Figs.fl, 5 and G are detail longitudinal sections on a larger scale taken onAA Fig. 2 and B B Fig. 3 and showing respectively the front, middle andrear portions o'f the machine. lfigs. 7, 8 and 9 are respectivelysections on C D E F, Gr Gr and H H of Fig. 4. Fig. 10 is a detailsection of the die. Fig. 'll -is a detail secof such mandrel..

The press comprises `two vertical heads on ends 1, 2 united by twohorizontal stayframes, 3, 3 formed with collars embracing 'thecylindrical extremities of the heads 1, 2.

The head l is cylindrical and forms a pivot for the cylinder 4, which isconstructed for this purpose with half collars or bearings to which arebolted the corresponding mem- Y bers 5, 5 Fig. 6. By this means thecylinder can be turned around its pivot as required,

which is a matter ofconvenience in erecting fitting or'repairing thepress. At the .other end the cylinder 4 is fixed in positionv ad-fjustably with relation to the stay frames 3' by bolts 6, Fig. 1. Thehead' 7 of the piston of the press is fitted in a dovetailseating 81 8ain a carriage or slide 8 (Figs. 1 and 5) guidedby the stay frames ,3kThis method of fitting the piston in the cariage facilitates erection'and dismounting. In the slide 8 is fitted a second slide9 adapted to betraversed across the machine and carrying the plunger 10.

The head 11 of the plunger 10 is detachably connected to the plunger forexample by a rightv and left handed screw 10a as shown, and can bereadily replaced according to the work required. For the production ofprofile bars of solid section they head 11 will usually be solid. Forthe production of tubular articles it will generally be constructedhollow as shown for example, in Figs. 4, 11 and 12 so as to provide acylindrical, or equivalent seating for the head 12 of a solid mandrel 13corresponding exactly with the interior of the tube to be obtained. u

The ingots employed for the production of tubes are as known formed witha longitudinal hole to give passage to the mandrel which is forcedforward by the plunger through the die with .the metal of the ingot. Inthe constructionshown in Figs. 4 and 11, the head 12 of the mandrel 13yhas a shoulder 130 at front and lits with a little friction in a socket131 at the forward end 11 ofthe plunger, the head 12 and the forward endof the plunger being flush with each other at front and occup ingthe'full width of the opening 132v in t e container, and the mandrelbeing coaxial with the opening and with the die 20, 21. Thus while'themandrel will move forward with the plunger inI the extrusion operation,the plunger can recede independently of the mandrel if this should. jaminthe extruded tube. At the same time the metal of the ingot 133 cannotpenetrate back behind the mandrel if this should tend to be drawnforward by the more rapid flow of the lmetal at the front through thedie; onthe contrary there is always opposed tothe back of the met-al ofthe ingot during extrusion a shoulder or wall occupying the full widthof the clear-v ance between the mandrel and the interior of the openinginthe container. The same result can be attained by {itt-ing the endofthe mandrel with slight friction on the forward endof the plungerinstead. of in a recess therein. Such an arrangementis shown in Fig.v12. Here the head 12a of the mandrel is seated on'a tenen 131a of thedetachable endl 11 of the plunger, the front face of the'mandrelhead-12a occupying the whole width of clearance between the mandrelandthe container.

In the production of thick or heavy tubes the mandrelmay be tubular,"inorder 'to make itlighter and to enable it to coolmore rapidly. Themandrel lies accurately in the axis of the die 20, 21 and insures equalor symmetrical distribution of the thicknesses ofthe metal.

When the slide 8 is moved back by the ordinary retractor cylinders 14,15 (Figs. 1 and 2) after the extrusion of the` ingot, the plunger canrecede independently of the mandrel. If the mandrel should jam vervtightly inthe tube produced, it .can be left. in and be removed with thetube from the press. Another mandrel can be setin the plunger for thenext operation. During this second operation .the first mandrel iswithdrawn from the drawn article outside the press and can be used for athird operation, and so on. v

16 is a dowel on the head on the mandrel and litt-ing in the head 11 ofthe plunger, this allows of setting the mandrel. accurately withrelation to the die in cases where the interiorl profile to be producedis not circular.

The carriage 9 can be slid transversely by means of a hand wheell 17(Fig. 1 when it is desired to uncover the mouth o the container or ingotchamber and the traversing mot-ion also enables the plunger and man`drel to be readily centered relatively to the divided die. A stop isprovided to insure that in the return movement the carriage 9 andplunger 10 shall come properly to axial position. bored for its fullheight and forms a cylinder in which work two pistons or plungers 18, 19each carryin one portion 20, 21 of a specialv two-part ie .(Figs. 4 and410). These' two parts 20, 21 bear against the halves 22. 23 of acylindrical bolster.

The forward head or end 2 is Losams also allows of rapidly changing thedie.

For this purpose it is only necessary to move the plunger 18, 19 apartand then after loosening therbolts 28, thefhalf dies can be turned halfaround `to release them from their seats, whereupon they can be re moved`from the machine. The operation of the plungers 18, 19`may beindependent and can be effected by any suitable means or source ofpower. In the example shown these plungers are operated `by .hydraulicpower through the medium of the slide 37 hereinafter described .andwhich actuates the container 34 in which the ingot to be operated uponis placed. This container is constructed in the known way of threecylinders 32, 33, 34 fitted together so as to torm a block. According to.the invention this container lits and is secured by a nut 35 in conicalcollar or holder 36 mounted by means of trunnions on a C-shaped slide 37(Fig. 9) guided by the stay frames 3, 3 similarly to the slide 8. Thecontainer is kept in its axial position by two strong pins 39, 40vlig. 1. lNhen these have been taken out, the container can be turned onits pivot into any position which may be desired, for the purpose ofdismounting it orfor inserting the ingot or for particular operations ofthe press. For dismounting the container, the pins 39, 40 are removed,the collar 3G is turned around 90 and the nut 35 is unscrewed. Owing tothe taper of the collar 36 the container can be readily removed from thecollar.

The slide 37 is adapted to move longitudinally between the stay frames 3under' the action ofa hydraulic cylinder 38 land itsA movements areimparted lo two bent arms 41, 42 (Fig. 4) attached to slide and passingthrough the head 2 of the press and the pistons 18, 19. These arms actas cams upon rollers 43, 44, 45, 46 mounted on spindles fixed in theplungers 18, 19 which are thereby caused to move vertically. When theslide 37 moves the container 34 away from the end 2, the arms 41, 42 acton the rollers 43, 44 and move the pistons apart, thus separating theparts 20, 21 of the die.

Intth'e reverse movement, when the slide 37 returns the-container 34against the end 2, the yarms 41, 42 act on the rollers 45, 46 and movethe two plungers inward so as to bring the vpart-s of the die together,which latter takes place before the container comes upon the conicalbearing surface of the die.

A resilient connection is provided between the plungers18', 19 andt-hearms 41, 42 4by means of the bearings 47, 48 traction orreturnirods49, 50 and springs 52-fitted i in boxes 51 (see Fig. 7). -When the parts20, 21 of the die come together the lungers 18, 19 are therefore inresilientrelatlon with the arms 41, 42. This resilient mounting allowsthe conicalbearing face of the die to become accurately seated'in therecess provided t'or this purpose in the container, and compels thelatter to bind upon and brace the parts 20, 21 of the die and hold them.powerfully together during the extrusion operation, preventing thecompressed metal from forcing 'the die parts away from each other orfrom penetrating between the piston and the portions of the die. Perfectcontact between the. bearing 'fa-ces of the die parts and their sea-t inthe container is also secured. It will be seen that this resiliency ofthe mounting of the plungers 18, 19 only comes into play when thecontainer comes upon the parts of the die.

The slide 37 may be coupledv directly to i the slide 8 by rods 53screwing into lugs 54 and secured by nuts. It can then be drawn back bymeans of the retractor pistons 14, 15 when it is desired tto obtainaccess to or remove the pistons 18, 19. In order to do this, thehandwheel 55 is first operated to uncouple the carriage 37 from the rodof the hydrauliccylinder 38.` The handwheel 56 is then operated torelease the spring detent 57 and to allow the same to catch and hold thepiston l8`suspended. 'lhen the slide 37 isdrawn back and the plungers18, 19 can now be readily removed from their cylinder.

Instead of hydraulic pressure l. may employ other fluid pressure or anyother power for operating the plunger, container and die actuatingmembers, or any of these parts as may be desired.

What I claim and desire to secure by Letters Patent is y 1. In `anextrusion press for the manilfacture of tubes, bars, rods and the like,a die divided into parts, in combination with acontainer, said containerand die being relatively movable, whereby they may be brt'iught togetherand apart, and means for moving the members of the die apart after t-heseparation of the die and container, whereby the extruded article can bereleased..

2. In an extrusion press for the manufacture of tubes, bars, rods andthe like, a die ture of tubes, bars, rods vand the like, a die dividedlongitudinally into parts, incombination with a container adapted togri-p and v bind the die when moved toward the same,

means for moving the container toward and away from the die, and meansfor moving the members of the die together for the eX- trusion operationand for moving them apart after the retraction of th'e container,substantially as described.

4. In an extrusion press for the manufac- 4 ture of tubes, bars, rodsand the like, a die divided into parts, members connected to said partsrespectively, and means for operating said members to move the die partstogether and apart, substantially as and for the purpose described.

vthe container to said die operating meinbers, whereby the die parts arebrought together in the motion of the container toward .the same and aremoved apart in the reverse motion of the container.

6. In an extrusion press for the manufacture of tubes, bars, rods andthe like, a die divided longitudinally into parts, die operating membersconnected to said die parts respectively and adapted to move the sametogether and apart, a sliding container, adapted to grip and bind thedie when moved up to the same, means for moving said container towardand away from the die, and means for imparting the motion oi thecontainer to said die operating members,

' whereby the die parts are brought together in t-hemotion of thecontainer toward the same and are moved apart in the reverse motion ofthe container.

7 In an extrusion press for the manufacture of tubes, bars, rods and thelike, a die divided into parts, sliding members'connected to said dieparts respectively, and means for operating said sliding members to movethe die parts together and apart, substantially as and for the purposesde# scribed.

8. In an extrusion press for the manufacture of tubes, bars, rods andthe like, a die divided longitudinally into two parts,plungersconnectedto said die parts respectively, a sliding container,means for moving said container toward and away from the die, cam barsin connection with said container, and rollers in connect-ion with saiflplungers and coacting with said cam bars, whereby the die parts arebrought together in the movement of the container toward the same andare moved apart in the reverse 'motion of' the container, substantiallyas described.

` 9. In an extrusion press for the manufacture of tubes, bars, rods andthe like, a die divided longitudinally into two parts, plungersconnected to'said die parts respectively,a sliding container adapted togrip and bind on the .die when moved up to the same, means for movingsaid container toward and away from the die, cam bars in connection'withsaid' container, and rollers in connection with said lplungers andcoacting with'said cam bars, whereby the die parts are brought togetherin the movement ot' the container towardthe same and are moved apart inthe reverse motion of the container, substantially as described.

10. In an extrusion press for the manufacture of tubes, bars, rods andthe like, a

die divided into parts, a sliding containerv away from the die and meansfor imparting the motion of said container to said die operatingmembers, said means being adapted to move the die parts together beforethe end of the forward motion 'of the container and to move them apartwhen the container has receded from the die.`

' ,12. In an extrusion press for the manufacture of tubes, bars, rodsand the like, a die divided longitudinally into parts, dieoperatingplungers connected to said parts respectively, a adapted to grip andbind the die, at the end of its forward stroke, a carriage for saidconveyer, a hydraulic cylinder and piston for reciprocating saidcarriage, levers operated'by the reciprocation of said carreciprocatingcontainer v riage and adapted in the forward stroke I thereof to movethe die operating plungers to close the die partstogether before the endof said forward stroke, and to move the plungers to bring the die partsapart in the backward stroke of the container carriage, substantially asdescribed.

` 13. In an extrusion press for the manufacture of tubes, bars, rods andthe like, a die divided into parts, and having a tapered bearing tace,in combination with die-operating members connected to said partsrespectively, a reciprocating container adapted to grip and bind en thetapered face ot the die at the end of its forward stroke, power operatedmeans for reciprocating the container, devices connected to saidcontainer and adapted to impart the motion near-,21s

thereof tothe die operating members whereby to close the. die part-sinthe forwardfstroke of' the-container, and a resilient.

connection between said devices and the die operating members for thepurpose specilied.

1.4. In an extrusion press for the manufac# ture of tubes, bars, rodsand the like, a die divided longitudinally into parts and having atapered bearing face, in combination with die operating plungersconnected to said parts respectively., a reciprocating container adaptedto grip and bind on the tapered face of the die at' the end. of' itsforward stroke, power operated means for reciprocating the container,leversconnected to said container and adapted to-irnpart the motionthereof to said plungersto close thev die parts inthe forward stroke ofthe container and' to open them in its return stroke, and a resilientconnection comprising traction rods and springs between saidlevers andsaid plungers for the purpose specified.

15. In an extrusion press for the manufacture of tubular articles, adivided die and means for moving the die parts together for theextrusion and apart to release the extruded article, .in combinationwith a container, an extrusion plunger and a mandrel in independent butfrict-ional con-- nectiou with said plunger, substantiallyas described.

16. In an extrusion press for the manufacture of tubular articles, adivided die and means for moving the die parts together for theextrusion and apart to release the extruded article, in combination witha container, an extrusion plunger, a detachable end for said plun er andadapted for independent but frictlonal engagement with a mandrel, and amandrel adapted for inde pendent frictional engagement with saiddetachable end.

17. In an extrusion ress for the manufacture of tubular articles, adivided die and means for moving the die parts together for theextrusion and apart to `release the extruded article, in combinationwith a container', an extrusion plunger adapted for independent butfrictonal engagement with a mandrel, a mandrel adapted for independentengagement 'with said plunger and to leave a. clearance between itselfand the interior of the container in the extrusion, and a body at therear of the mandrel, adapted to fill the rear of the clearance betweenthe mandrel and the container, andr to prevent back liow of metal whenthe mandrel is d rawn forward lby the metal under extrusion.

1.8. In an extrusion ross for the manufacture of tubular articles, adivided die and means for moving the die parts trogetlierA for theextrusion and apart to release the extruded article, 1n combinatlon w1tha container, an extrusion plunger provided` with seat for a: headI onthemandrel, a mandrely adapted toA leave a clearance between itself and theinterior of the container inthe extrusion andlhav-ing a head adapted tobe fitted independently but with friction to the end. of the plunger,and to present a body at the rear of said clearance for preventing backflow of metal when the mandrel is draw-n 4forward by the metal underextrusion..

19. In an extrusion press for the manufacture of tubes, bars,- rodsandthe like,.the combination. of a.` divided die, meansy tor moving the dieparts together for the ex tnusion and` apart to' release the' extrudedarticle, container, an extrusion plunger, and a iiuid pressure cylinderand piston for pperating, said plunger, said cylinder being ,pivotallymounted in the press substantially as and'for the purposes specified.20. In an extrusion press for the manufacture of tubes, bars, rods andthe like, the combination-of a divided die, means for moving the dieparts together for the extrusion and apart to release the extrudedarticle, a container,A an extrusion plunger,

a slide for reciprocating said plunger, a

tluid pressure cylinder and piston for reciprocating said slide, atraversing slide on said reciprocating slide and carrying said plunger,and means for traversing said traversing slide across vthe machine,substantially as described.

21.In an extrusion press for the manufacture of tubes, rods, bars andthe like, the combination of a divided die, means for moving the .dieparts together for the extrusion and apart to release the extrudedarticle, an extrusion plunger, a slide for reciprocating said plunger, afluid ressure cylinder and piston for reciprocating said slide, and adovetail connection between the head of the piston and saidreciprocating s facture of tubes, rods, liars and the like, the

combination of a divided die, means for moving the die parts togetherfor the extrusion and apart to release the extruded article, anextrusion plunger, a pivotally mounted container adapted to Vbe turnedinto and out of posit-ion coaxial with the plunger', and means forsecuring the container in said coaxial position, substantially asdescribed.

23. In an extrusion press for the manufacture of tubes, rods, bars andthe like, the combination of a divided die, means for moving the dieparts together for the extrusion and apart to release the extrudedarticle, an extrusion plunger, a reciprocating slide, a conical holder(38) trunnioned inA said slide, and a conical container mounted in saidholder, whereby the centainer can be turned into and out of positioncoaxial with the plunger, and means for securing the container holderin' the coaxial position, substantially as described.

24. In an extrusion press for the manufacture of tubes, rods, bars andthe like, a longitudinally divided die in combination 'with poweroperated means for closing the f die parts together.

25. In an .extrusion press for the manufacture off tubes, rods, bars andthe like, a longitudinally divided die in combination with poweroperated means for closing the die parts together and for moving thesame apart. Y

26. In an extrusion press for the manufacture of tubes, rods, bars andthe like, the

combination ,ofy half dies (20, 21) sliding members for closin vandopening the half dies, half bolsters 6, 27). half rings (24, 25) xed tothe half bolsters and centering and supporting the halves of the die,and

half collars (26,V 27) for securing the half bolsters tothe said slidingmembers respectively and clamping the half dies to said half rings,substantially as described.

In Wltness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses. f e

LOUIS GEORGES DERAIN.

Witnesses:

J'. E.- DUPEN, C.` -DONIHAN-

